<template>
  <div class="todo-footer" v-if="all">
    <label>
      <input type="checkbox" :checked="isAll" @change="checkAll($event)"/>
    </label>
    <span>
          <span>已完成 {{ hasDone }}</span> / 全部{{all}}
        </span>
    <button class="btn btn-danger" @click="clearDone">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "Bottom",
  props:["list","checkAll","clearDone"],
  computed:{
    all(){
      return this.list.length
    },
    hasDone(){
      return this.list.filter(item=>item.done).length
    },
    isAll(){
      return this.all===this.hasDone && this.all>0
    }
  }
}
</script>

<style scoped>


/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
